Make it possible to use as a dependency

build.zig

@@ -3,7 +3,7 @@ const std = @import("std");
 // Although this function looks imperative, note that its job is to
 // declaratively construct a build graph that will be executed by an external
 // runner.
-pub fn build(b: *std.Build) void {
+pub fn build(b: *std.Build) !void {
     // Standard target options allows the person running `zig build` to choose
     // what target to build for. Here we do not override the defaults, which
     // means any target is allowed, and the default is native. Other options
@@ -15,6 +15,12 @@ pub fn build(b: *std.Build) void {
     // set a preferred release mode, allowing the user to decide how to optimize.
     const optimize = b.standardOptimizeOption(.{});
 
+    const zigjson_module = b.createModule(.{
+        .root_source_file = b.path("src/root.zig"),
+    });
+
+    try b.modules.put(b.dupe("zigjson"), zigjson_module);
+
     const lib = b.addStaticLibrary(.{
         .name = "zigjson",
         // In this case the main source file is merely a path, however, in more